Response to: Comment on "Noninvasive Ventilation Weaning in Acute Hypercapnic Respiratory Failure due to COPD Exacerbation: A Real-Life Observational Study". (8th October 2019) - Faverio, Paola; Stainer, Anna; De Giacomi, Federica; Messinesi, Grazia; Paolini, Valentina; Monzani, Anna; Sioli, Paolo; Memaj, Irdi; Sibila, Oriol; Mazzola, Paolo; Pesci, Alberto